Pump types

Part 2 book "Air conditioning and refrigeration" includes content: Refrigerant - flow control; servicing and safety; freezers; temperature, psychrometrics and air control; comfort air conditioning; commercial air conditioning systems; various types of air conditioners and heat pumps; estimating load and insulating pipes; installing and controlling electrical power for air conditioning units; air conditioning and refrigeration careers.

306p dianmotminh01 20-05-2024 2 1   Download

This specification covers austenitic ductile iron, Type D-2M, Classes 1 and 2, for compressors, expanders, pumps, valves, and other pressure-containing parts intended primarily for low-temperature service.

5p hth_hn_vn 10-12-2023 7 3   Download

In this work, we study the generation of a negative refractive index based on electromagnetically induced transparency (EIT) in a Rb four-level N-type atomic gas medium. We derive analytic expressions for the relative permittivity and relative permeability of the medium according to the parameters of the probe, pump, and signal laser fields.

14p viberkshire 09-08-2023 9 4   Download

Artificial pancreas systems aim to reduce the burden of type 1 diabetes by automating insulin dosing. These systems link a continuous glucose monitor (CGM) and insulin pump with a control algorithm, but require users to announce meals, without which the system can only react to the rise in blood glucose.

8p visteverogers 24-06-2023 2 2   Download

This article gives some fundamental views about benefits of PSH, the current situation of using this type of energy in Vietnam, as well as some basic factors affecting the site selection to build the project. Then, we are going to give some assessments about exploration and development of PSH in Vietnam.

3p vicaptainmarvel 21-04-2023 7 3   Download

Westinghouse type plants in the United States (US) and Europe have a manual trip procedure of the reactor coolant pumps (RCP) in the case of a small break Loss of Coolant Accident (LOCA) with the high pressure injection (HPI) system functioned. This is in response to the Three Mile Island (TMI) accident in order to maintain as much the forced core cooling as possible.

6p vironald 15-12-2022 10 3   Download

(BQ) presents the following content: Chapter 5 series and parallel pipeline systems, chapter 6 pumps and turbines, appendix A properties of water, appendix B properties of common liquids, appendix C dimensions of steel pipe, appendix D dimensions of type k copper tubing, appendix E conversion factors.

76p runordie6 10-08-2022 7 2   Download

We investigate the dynamical of pulse propagation and all-optical switching via a spontaneously generated coherence (SGC) in a three-level ladder-type atomic medium driven by a coupling field under the presence of incoherent pumping. Results show that the SGC causes modulations at the leading edge of the pulse envelope shape.

8p vistephenhawking 26-04-2022 12 2   Download

Plant P-type II Ca2+ATPases are formed by two distinct groups of proteins (ACAs and ECAs) that perform pumping of Ca2+ outside the cytoplasm during homeostasis, and play vital functions during development and stress management. In the present study, we have performed identification and characterisation of P-type II Ca2+ATPase gene family in an important crop plant Triticum aestivum.

16p vibeauty 23-10-2021 9 1   Download

A tractor drawn roto drill cum herbicide applicator (RDHA) was developed during 2012- 13, at College of Agricultural Engineering, Bapatla. It was developed for adaption of minimum till technology and timeliness of and herbicide application operations. The RDHA was a combination of rotovator, seed hopper (Trough feed type) and rocker sprayer pump. It performs tillage, sowing and herbicide application simultaneously in single pass of tractor.

9p cothumenhmong9 18-01-2021 12 2   Download

Pumping system powered by kinetic energy of water from nearby nallah can be a cheap, efficient and precise way of delivering water to nearby farm pond/open well. The pumping system is simple to develop, install, operate and very much cater to the need of rural remote area. It may be suitable for un-electrified as well as unreliable electric supply area provided suitable site conditions are available. The major components of spiral tube water wheel pumping system include rim, inlet valve, housing, flexible pipe, bearing, T-joint etc.

9p caygaocaolon6 30-07-2020 13 1   Download

The use of photovoltaic (PV) module for push type solar operated sprayer is one of the most promising techniques in solar energy application. The push type solar operated sprayer consists of a PV module of 20W and two diaphragm type pumps of 0.03hp each. The system was tested for its performance in terms of variation is in nozzle discharge for different operating pressure and height.

9p quenchua6 15-06-2020 11 1   Download

Goal of the research is an analysis of economical efficiency of geothermal energy use in North-West region of Russia using an example of heat pumps. Authors considered expediency of Earth’s geothermal energy use in North-West district using an example of European states. Analysis of specific factors characterizing this type of energy, as well as its extraction and used technology is done.

11p cleopatrahuynh 01-06-2020 12 0   Download

This paper presents an electric back sprayer based on the attributes required by sprayer users with the Quality Function Deployment (QFD) methodology by optimizing sprayers owned by farmers. In agriculture, the process of crop management and care and pest control is carried out routinely to obtain optimal results. The technical implementation of these efforts is carried out through soil and air media by spraying the plant organs. To keep the pressure and spray results stable, continuous pumping is required. This resulted in certainly more energy needed.

6p lucastanguyen 28-05-2020 26 1   Download

Geothermal ventilation provides a better alternative in securing the energy crises. Geothermal energy is a heat contained within the earth that generates geological phenomena on a planetary scale. It is not only available in the form of volcanoes, hot water stream but, whole earth acts as a source of geothermal energy for 365 days and all season of year. There are three basic components of geothermal heating pump system (GHPS); ground loop, geothermal heat pump and distribution system.

10p chauchaungayxua5 08-05-2020 15 0   Download

Based on the average standardized energy cost over the entire lifetime of the project, the possibility of choosing a heat pump installation using lowpotential heat as a source of heat for an individual consumer is shown. As an example, to assess the economic performance of a heat pump installation in the Chelyabinsk region 6 variants of heat supply systems are considered, taking into account the climatic characteristics of the region for four types of individual houses.

5p partimesinhvien 13-05-2020 13 1   Download

Extrusion cooking technology is very efficient state-of-art technology adopted by snacks food industries. It is high temperature, short time high pressure, continuous process. Unit operations involved in extrusion cooking process are conveying, mixing, shearing, heating, and shaping. Various types of extruders used by food manufacturers in snacks industries such as piston extruders, roller-type extruders, and screw extruders (Single-screw extruder and Twin-screw extruder).

5p kethamoi2 15-12-2019 11 0   Download

The developments of granules incorporating green tea extract with cocoa powder using fluidized bed dryer. The product is more concern to the polyphenol is abundant micronutrients in our diet, and evidence for their role in the prevention of degenerative diseases. The antioxidant properties are present more in the vegetables and fruits and as their intake are not consumed due to in conveniences and lack of time.

7p chauchaungayxua1 04-12-2019 9 0   Download

The effective estimation of costs is crucial to the success of construction projects. Cost estimates are used to evaluate, approve and/or fund projects. Organizations use some form of classification system to identify the various types of estimates that may be prepared during the lifecycle of a project. This research presents a parametric-cost model for pump station projects. Fourteen factors have been identified as important to the influence of the cost of pump station projects.

7p kethamoi1 20-11-2019 20 1   Download

Stenotrophomonas maltophilia is a multi-drug resistant opportunistic pathogen that causes nosocomial infections in immunocompromised patients. This pathogen is difficult to treat owing to its intrinsic multidrug resistance and ability to form antimicrobial-tolerant biofilms.

11p vinasaki2711 12-11-2019 10 0   Download